Abstract
Pisum sativum L. cv Alsweet (garden pea) and Lycopersicon esculentum flacca Mill. (tomato) were used to evaluate the phytotoxicity of SO(2) and O(3) in the light and dark. Plants were grown in controlled environment chambers and exposed to SO(2) or O(3) in the light or dark at the same environmental conditions at which they were grown. The pea plants were treated with fusicoccin to ensure open stomata in the dark; the stomata of the tomato mutant remained open in the dark. Both species exhibited 64% to 80% less foliar necrosis following exposure to SO(2) (0.5 to 1.0 microliter per liter for 2 hours) in the light than in the dark. The decrease in SO(2) injury for light versus dark exposed plants was greater in fully expanded than expanding leaves. Both species exhibited 30% greater foliar necrosis following exposure to O(3) (0.2 microliter per liter for 2 hours) in the light than dark. The increase in O(3) injury in the light versus dark was similar for leaves at all stages of expansion. Leaf conductance to water vapor was 7% to 11% and 23% higher in the light than dark for fusicoccin-treated peas and tomato plants, respectively, indicating greater foliar uptake of both pollutants in the light than dark. Thus, the decreased SO(2) toxicity in the light was not associated with pollutant uptake, but rather the metabolism of SO(2). In contrast, the increased toxicity of O(3) in the light was at least in part associated with increased uptake or could not be separated from it.
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Claims 10
Claim · model-written summary
Garden pea showed 64% to 80% less foliar necrosis after SO2 exposure in the light than in the dark.
- Taxon
- Pisum sativum
Lathyrus oleraceuse0 - Treatment
- exposure to SO(2) (0.5 to 1.0 microliter per liter for 2 hours) in the lighte1
- Outcome
- foliar necrosise1
- Direction
- lesse1
- Value
- 64% to 80%e1
- Comparator
- the darke1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pisum sativum L. cv Alsweet (garden pea)”
e1“Both species exhibited 64% to 80% less foliar necrosis following exposure to SO(2) (0.5 to 1.0 microliter per liter for 2 hours) in the light than in the dark”
Claim · model-written summary
Tomato showed 64% to 80% less foliar necrosis after SO2 exposure in the light than in the dark.
- Taxon
- Lycopersicon esculentum
Solanum lycopersicume0 - Treatment
- exposure to SO(2) (0.5 to 1.0 microliter per liter for 2 hours) in the lighte1
- Outcome
- foliar necrosise1
- Direction
- lesse1
- Value
- 64% to 80%e1
- Comparator
- the darke1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Lycopersicon esculentum flacca Mill. (tomato)”
e1“Both species exhibited 64% to 80% less foliar necrosis following exposure to SO(2) (0.5 to 1.0 microliter per liter for 2 hours) in the light than in the dark”
Claim · model-written summary
The decrease in SO2 injury for light versus dark exposed plants was greater in fully expanded leaves than in expanding leaves.
- Taxon
- Pisum sativum L. cv Alsweet (garden pea) and Lycopersicon esculentum flacca Mill. (tomato)Lathyrus oleraceuse0
- Organ / stage
- fully expandede1
- Outcome
- decrease in SO(2) injurye1
- Direction
- greatere1
- Comparator
- expanding leavese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pisum sativum L. cv Alsweet (garden pea) and Lycopersicon esculentum flacca Mill. (tomato)”
e1“The decrease in SO(2) injury for light versus dark exposed plants was greater in fully expanded than expanding leaves”
Claim · model-written summary
Garden pea showed 30% greater foliar necrosis after O3 exposure in the light than in the dark.
- Taxon
- Pisum sativumLathyrus oleraceuse0
- Treatment
- exposure to O(3) (0.2 microliter per liter for 2 hours) in the lighte1
- Outcome
- foliar necrosise1
- Direction
- greatere1
- Value
- 30%e1
- Comparator
- darke1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pisum sativum L. cv Alsweet (garden pea)”
e1“Both species exhibited 30% greater foliar necrosis following exposure to O(3) (0.2 microliter per liter for 2 hours) in the light than dark”
Claim · model-written summary
Tomato showed 30% greater foliar necrosis after O3 exposure in the light than in the dark.
- Taxon
- Lycopersicon esculentumSolanum lycopersicume0
- Treatment
- exposure to O(3) (0.2 microliter per liter for 2 hours) in the lighte1
- Outcome
- foliar necrosise1
- Direction
- greatere1
- Value
- 30%e1
- Comparator
- darke1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Lycopersicon esculentum flacca Mill. (tomato)”
e1“Both species exhibited 30% greater foliar necrosis following exposure to O(3) (0.2 microliter per liter for 2 hours) in the light than dark”
Claim · model-written summary
The increase in O3 injury in the light versus dark was similar for leaves at all stages of expansion.
- Taxon
- Pisum sativum L. cv Alsweet (garden pea) and Lycopersicon esculentum flacca Mill. (tomato)Lathyrus oleraceuse0
- Organ / stage
- leaves at all stages of expansione1
- Outcome
- increase in O(3) injurye1
- Direction
- similare1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pisum sativum L. cv Alsweet (garden pea) and Lycopersicon esculentum flacca Mill. (tomato)”
e1“The increase in O(3) injury in the light versus dark was similar for leaves at all stages of expansion”
Claim · model-written summary
Leaf conductance to water vapor was 7% to 11% higher in the light than in the dark for fusicoccin-treated peas.
- Taxon
- peasLathyrus oleraceuse1
- Treatment
- the lighte1
- Outcome
- Leaf conductance to water vapore1
- Direction
- highere1
- Value
- 7% to 11%e1
- Comparator
- darke1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Leaf conductance to water vapor was 7% to 11% and 23% higher in the light than dark for fusicoccin-treated peas and tomato plants, respectively”
Claim · model-written summary
Leaf conductance to water vapor was 23% higher in the light than in the dark for tomato plants.
- Taxon
- tomato plantsSolanum lycopersicume1
- Treatment
- the lighte1
- Outcome
- Leaf conductance to water vapore1
- Direction
- highere1
- Value
- 23%e1
- Comparator
- darke1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Leaf conductance to water vapor was 7% to 11% and 23% higher in the light than dark for fusicoccin-treated peas and tomato plants, respectively”
Claim · model-written summary
The decreased SO2 toxicity in the light was not associated with pollutant uptake but rather with the metabolism of SO2.
- Taxon
- Pisum sativum L. cv Alsweet (garden pea) and Lycopersicon esculentum flacca Mill. (tomato)Lathyrus oleraceuse0
- Treatment
- the lighte1
- Outcome
- decreased SO(2) toxicitye1
- Qualifier
- not associated with pollutant uptake, but rather the metabolism of SO(2)e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pisum sativum L. cv Alsweet (garden pea) and Lycopersicon esculentum flacca Mill. (tomato)”
e1“the decreased SO(2) toxicity in the light was not associated with pollutant uptake, but rather the metabolism of SO(2)”
Claim · model-written summary
The increased O3 toxicity in the light was at least in part associated with increased uptake or could not be separated from it.
- Taxon
- Pisum sativum L. cv Alsweet (garden pea) and Lycopersicon esculentum flacca Mill. (tomato)Lathyrus oleraceuse0
- Treatment
- the lighte1
- Outcome
- increased toxicity of O(3)e1
- Qualifier
- at least in part associated with increased uptake or could not be separated from ite1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pisum sativum L. cv Alsweet (garden pea) and Lycopersicon esculentum flacca Mill. (tomato)”
e1“the increased toxicity of O(3) in the light was at least in part associated with increased uptake or could not be separated from it”
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See all 36 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.